872301521 has 16 divisors (see below), whose sum is σ = 1079186304. Its totient is φ = 686582784.

The previous prime is 872301517. The next prime is 872301553. The reversal of 872301521 is 125103278.

It is a cyclic number.

It is not a de Polignac number, because 872301521 - 2² = 872301517 is a prime.

It is not an unprimeable number, because it can be changed into a prime (872301581) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 7271 + ... + 42396.

It is an arithmetic number, because the mean of its divisors is an integer number (67449144).

Almost surely, 2^872301521 is an apocalyptic number.

It is an amenable number.

872301521 is a deficient number, since it is larger than the sum of its proper divisors (206884783).

872301521 is a wasteful number, since it uses less digits than its factorization.

872301521 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 49880.

The product of its (nonzero) digits is 3360, while the sum is 29.

The square root of 872301521 is about 29534.7510739468. The cubic root of 872301521 is about 955.4813399128.

Adding to 872301521 its reverse (125103278), we get a palindrome (997404799).

The spelling of 872301521 in words is "eight hundred seventy-two million, three hundred one thousand, five hundred twenty-one".